Cross section and parity-violating spin asymmetries of W± boson production in polarized p+p collisions at √s=500GeV

Awadhesh Kumar Dubey, Mihael Makek, Alexander Milov, Deepali Sharma, Itzhak Tserruya,

نتاج البحث: نشر في مجلةمقالةمراجعة النظراء

ملخص

Large parity-violating longitudinal single-spin asymmetries ALe +=-0.86-0.14+0.30 and ALe-=0.88-0.71+0.12 are observed for inclusive high transverse momentum electrons and positrons in polarized p+p collisions at a center-of-mass energy of √s=500GeV with the PHENIX detector at RHIC. These e± come mainly from the decay of W± and Z0 bosons, and their asymmetries directly demonstrate parity violation in the couplings of the W± to the light quarks. The observed electron and positron yields were used to estimate W ± boson production cross sections for the e± channels of σ(pp→W+X)×BR(W+→e +νe)=144.1±21.2(stat)-10.3+3.4(syst)±21. 6(norm)pb, and σ(pp→W-X)×BR(W -→e-ν̄e)=31.7±12.1(stat)-8. 2+10.1(syst)±4.8(norm)pb.

اللغة الأصليةالإنجليزيّة
رقم المقال062001
دوريةPhysical review letters
مستوى الصوت106
رقم الإصدار6
المعرِّفات الرقمية للأشياء
حالة النشرنُشِر - 11 فبراير 2011

All Science Journal Classification (ASJC) codes

  • !!General Physics and Astronomy

بصمة

أدرس بدقة موضوعات البحث “Cross section and parity-violating spin asymmetries of W± boson production in polarized p+p collisions at √s=500GeV'. فهما يشكلان معًا بصمة فريدة.

قم بذكر هذا